Cabin air compressor support bracket

ABSTRACT

A support bracket for a cabin air compressor (CAC) assembly includes a CAC mounting portion formed substantially orthogonal to an access portion and a structural support portion. A cross-support bracket mounting portion is formed at an angle relative to the access portion. An upper lug portion is formed at an angle relative to the access portion and substantially orthogonal to an upper lug. A plurality of CAC mounting holes is formed in the CAC mounting portion. A plurality of lower slotted holes and an upper slotted hole are formed in the cross-support bracket mounting portion. A ratio of a length of longitudinal offset defined between the lower slotted holes and the upper slotted hole to a length of lateral offset between a center of at least one of the lower slotted holes and the upper slotted hole is between 2.47 and 2.91.

BACKGROUND OF THE INVENTION

The subject matter disclosed herein relates to aircraft environmentalcontrol. More specifically, the subject disclosure relates to a supportbracket of a cabin air compressor for an aircraft environmental controlsystem.

Environmental control systems (ECSs) are utilized on various types ofaircraft for several purposes, such as in cooling systems for theaircraft. For example, components of an ECS may be utilized to removeheat from various aircraft lubrication and electrical systems and/orused to condition aircraft cabin air. A cabin air conditioning andtemperature control system (CACTCS) is an example of an aircraft ECSthat includes air cycle packs supplied with pressurized outside (fresh)air from electric motor-driven cabin air compressors (CACs) whichcondition fresh air for cabin heating and cooling. The CACTCS providesflow control for modulation of cooling pack air flow, recirculation fansto circulate cabin air, and associated valves and sensors used forsystem control.

The CACTCS may also include a trim air system to provide individualcabin zone temperature control. This includes trim temperature controlvalves, trim duct heaters and associated sensors. As one example, aCACTCS may provide control of six baseline passenger zones and a flightdeck zone. Additional zones, such as a forward cargo zone, a crew zoneand/or an attendant zone may be controlled by other ECSs. Recirculationfans may also be provided for additional air flow to the passenger cabinand to ensure that flow at an air distribution nozzle remains constant.

Various elements of aircraft ECSs can experience harsh environmentsincluding a wide range of temperatures, pressures, and vibrations.Elements of aircraft ECSs must also fit within a compact space andminimize weight while providing adequate strength to handle typical andpeak stresses over the anticipated life of the elements.

BRIEF DESCRIPTION OF THE INVENTION

According to one aspect, a support bracket for a cabin air compressorassembly is provided. The support bracket includes a cabin aircompressor mounting portion formed substantially orthogonal to an accessportion and a structural support portion. A cross-support bracketmounting portion is formed at an angle relative to the access portion.An upper lug portion is formed at an angle relative to the accessportion and substantially orthogonal to an upper lug. A plurality ofcabin air compressor mounting holes is formed in the cabin aircompressor mounting portion. The cabin air compressor mounting holes aredistributed in an arc configuration along a cabin air compressormounting hole circle radius. A plurality of lower slotted holes and anupper slotted hole are formed in the cross-support bracket mountingportion. A ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.

According to another aspect, a cabin air compressor support assembly isprovided. The cabin air compressor support assembly includes a left-handcabin air compressor support bracket coupled to a cabin air compressorassembly, a cross-support bracket, and an upper three-way mount. Thecabin air compressor support assembly also includes a right-hand cabinair compressor support bracket coupled to the cabin air compressorassembly, the cross-support bracket, and a lower three-way mount. Theright-hand cabin air compressor support bracket includes a cabin aircompressor mounting portion formed substantially orthogonal to an accessportion and a structural support portion. A cross-support bracketmounting portion is formed at an angle relative to the access portion.An upper lug portion is formed at an angle relative to the accessportion and substantially orthogonal to an upper lug. A plurality ofcabin air compressor mounting holes is formed in the cabin aircompressor mounting portion. The cabin air compressor mounting holes aredistributed in an arc configuration along a cabin air compressormounting hole circle radius. A plurality of lower slotted holes and anupper slotted hole are formed in the cross-support bracket mountingportion. A ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.

According to a further aspect, a method of installing a support bracketin a cabin air conditioning and temperature control system is provided.An upper lug of the support bracket is coupled to a mount of the cabinair conditioning and temperature control system. A cabin air compressormounting portion of the support bracket is coupled to a cabin aircompressor assembly of the cabin air conditioning and temperaturecontrol system. A cross-support bracket mounting portion of the supportbracket is coupled to a cross-support bracket. The support bracketincludes the cabin air compressor mounting portion formed substantiallyorthogonal to an access portion and a structural support portion. Thecross-support bracket mounting portion is formed at an angle relative tothe access portion. An upper lug portion is formed at an angle relativeto the access portion and substantially orthogonal to the upper lug. Aplurality of cabin air compressor mounting holes is formed in the cabinair compressor mounting portion. The cabin air compressor mounting holesare distributed in an arc configuration along a cabin air compressormounting hole circle radius. A plurality of lower slotted holes and anupper slotted hole are formed in the cross-support bracket mountingportion. A ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial perspective view of a cabin air conditioning andtemperature control system;

FIG. 2 is another partial perspective view of the cabin air conditioningand temperature control system of FIG. 1;

FIG. 3 is a perspective view of a cabin air compressor support bracket;

FIG. 4 is another view of the cabin air compressor support bracket ofFIG. 3;

FIG. 5 is a detailed view of a cabin air compressor mounting portion ofthe cabin air compressor support bracket of FIG. 3;

FIG. 6 is another view of the cabin air compressor support bracket ofFIG. 3; and

FIG. 7 is detailed view of a portion of a cross-support bracket mountingportion of the cabin air compressor support bracket of FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

Shown in FIGS. 1 and 2 are partial perspective views of a cabin airconditioning and temperature control system (CACTCS) 100. The CACTCS 100includes an upper three-way mount 102 with coupling points 104 a and 104b. The upper three-way mount 102 may also be coupled to one or morevibration isolators 106. The coupling point 104 a is coupled to a firstcabin air compressor (CAC) support bracket 108. The first CAC supportbracket 108 is coupled to a CAC 110 and a cross-support bracket 112. Thecross-support bracket 112 is coupled to a second CAC support bracket114. The second CAC support bracket 114 is coupled to the CAC 110 and acoupling point 116 a of a lower three-way mount 118 as best viewed inFIG. 2. Similar to the upper three-way mount 102, the lower three-waymount 118 includes a pair of coupling points 116 a and 116 b. The firstCAC support bracket 108, the cross-support bracket 112, and the secondCAC support bracket 114 collectively form a CAC support assembly 120.The first CAC support bracket 108 may also be referred to as a left-handCAC support bracket, and the second CAC support bracket 114 may bereferred to as a right-hand CAC support bracket. The coupling points 104b and 116 b may be used to support a second CAC (not depicted), wherethe CAC 110 may be referred to as an outer CAC and the second CAC (notdepicted) may be referred to as an inner CAC. The three-way mounts 102and 118 limit CAC movement in three directions (X-Y-Z).

FIG. 3 is a perspective view of the second CAC support bracket 114 ofFIGS. 1 and 2. The second CAC support bracket 114 includes a CACmounting portion 350, an access portion 352, a cross-support bracketmounting portion 354, an upper lug portion 356, and an upper lug 358.The second CAC support bracket 114 also includes a structural supportportion 360 as best viewed in FIG. 4. The CAC mounting portion 350includes a first CAC mounting hole 362, a second CAC mounting hole 364,and a third CAC mounting hole 366 distributed in an arc configuration.The CAC mounting holes 362 and 366 are also referred to as the outermostCAC mounting holes 362 and 366 relative to the CAC mounting hole 364.The CAC mounting portion 350 also includes a substantially triangularshaped lightening region 368. The access portion 352 includes asubstantially circular access aperture 370. The cross-support bracketmounting portion 354 includes three slotted holes 372, 374, and 376,which are also referred to as lower slotted holes 372,374 and upperslotted hole 376. The upper lug 358 includes a coupling hole 378.

The CAC mounting portion 350 is formed substantially orthogonal to theaccess portion 352 and the structural support portion 360 of FIG. 4. Thecross-support bracket mounting portion 354 is formed at an anglerelative to the access portion 352, and the upper lug portion 356 isformed at an angle relative to the access portion 352. The upper lug 358is formed substantially orthogonal to the upper lug portion 356.

The CAC mounting holes 362-366 are configured to mate the second CACsupport bracket 114 to the CAC 110 of FIG. 1. The slotted holes 372-376are configured to mate the second CAC support bracket 114 with thecross-support bracket 112 of FIG. 1. The coupling hole 378 is configuredto mate the second CAC support bracket 114 with the coupling point 116 aof FIG. 1. Various fastener apparatuses (not depicted), such as bolts,can be used to perform mating of various components.

FIG. 4 is another view of the CAC support bracket 114 depicting thestructural support portion 360 and side views of the CAC mountingportion 350, the access portion 352, the cross-support bracket mountingportion 354, the upper lug portion 356, and the upper lug 358. A datum Adefines a reference on the CAC mounting portion 350, and centerline B(CLB) defines a centerline through CAC mounting hole 362. Datum A isdefined on a CAC side 375 of the CAC mounting portion 350 that is incloser proximity to the CAC 110 upon coupling the CAC support bracket114 to the CAC 110. A first angle (θ1) of about 28 degrees is definedbetween CLB and the cross-support bracket mounting portion 354 at alength L1 of about 9.95 inches (25.273 cm) from CLB at datum A to thecross-support bracket mounting portion 354. A second angle (θ2) of about50 degrees is defined between CLB and the upper lug portion 356 at alength L2 of about 12.115 inches (30.772 cm) from CLB at datum A to theupper lug portion 356. The second angle θ2 is also defined between CLBand a central axis 377 of the coupling hole 378 at a length L3 of about13.608 inches (34.564 cm) from CLB at datum A to the central axis 377 ofthe coupling hole 378. A length L4 of about 5.324 inches (13.523 cm) isdefined from a projection 379 normal to CLB at datum A to the upper lug358. A length L5 of about 6.755 inches (17.158 cm) is defined from theprojection 379 normal to CLB at datum A to an upper end 380 that issubstantially orthogonal to the upper lug portion 356. The upper lug 358has a thickness T1 of about 0.815 inches (2.070 cm).

FIG. 5 is a detailed view of the CAC mounting portion 350 of the CACsupport bracket 114. The CAC mounting holes 362, 364, and 366, eachhaving a diameter D1 of about 0.406 inches (1.031 cm), are distributedin an arc configuration along a CAC mounting hole circle radius R1 ofabout 8.375 inches (21.273 cm) positioned between a curved edge 382 ofthe CAC mounting portion 350 and the substantially triangular shapedlightening region 368. A length L6 of about 1.125 inches (2.858 cm)separates the curved edge 382 of the CAC mounting portion 350 and thesubstantially triangular shaped lightening region 368. Relative to CLB,CAC mounting hole 364 is offset by an angle θ3 of about 25 degrees andCAC mounting hole 366 is offset by an angle θ4 of about 50 degrees atthe CAC mounting hole circle radius R1. A first angled edge 384proximate the CAC mounting hole 366 is offset by an angle θ5 of about41.61 degrees relative to CLB. The first angled edge 384 is formedbetween the curved edge 382 and an outer edge 386 of the CAC mountingportion 350. A length L7 of about 8.325 inches (21.146 cm) is definedbetween the outer edge 386 and CLB. The outer edge 386 is substantiallynormal to a lower edge 388 of the CAC mounting portion 350. A length L8of about 2.225 inches (5.652 cm) is defined between the lower edge 388and CLB.

A second angled edge 390 is formed between the lower edge 388 and thecurved edge 382 of the CAC mounting portion 350 at an angle θ6 of about19.6 degrees relative to the lower edge 388. A length L9 of about 1.24inches (3.150 cm) separates the second angled edge 390 of the CACmounting portion 350 and the substantially triangular shaped lighteningregion 368. An edge 392 of the substantially triangular shapedlightening region 368 is positioned at a length L10 of about 6 inches(15.24 cm), where the edge 392 is substantially parallel to the outeredge 386.

FIG. 6 is another view of the CAC support bracket 114 according to anembodiment as taken at section line 6 of FIG. 4. A reference point 400is defined as the intersection of CLB and datum A of FIG. 4 based on theorientation of the CAC support bracket 114 in FIG. 6. The referencepoint 400 may be located based on a projection 402 of an angled edge 404of the cross-support bracket mounting portion 354. A reference line 406is defined at a length L11 of about 1.915 inches (4.864 cm) from theprojection 402, where the reference line 406 extends to the referencepoint 400 and forms an angle θ7 of about 13 degrees relative to CLB. Thelower slotted holes 372 and 374 are offset by a length L12 of about4.423 inches (11.234 cm) from the reference point 400. The upper slottedhole 376 is longitudinally offset by a length L13 of about 1.375 inches(3.493 cm) from the lower slotted holes 372 and 374 relative to thecenter of each of the slotted holes 372-376. Each of the slotted holes372-376 has a length L14 of about 0.8 inches (2.032 cm) and a width W1of about 0.413 inches (1.049 cm). The slotted hole 374 is offset by alength L15 of about 1.025 inches (2.604 cm) from CLB. The slotted hole372 is offset by a length L16 of about 0.898 inches (2.281 cm) from theslotted hole 374. The slotted hole 376 is laterally offset by a lengthL17 of about 0.513 inches (1.303 cm) from the slotted hole 372 betweenrespective centers of the slotted holes 376 and 372. The slotted hole376 may also be laterally offset by length L17 from the slotted hole 374between respective centers of the slotted holes 376 and 374.

The view of the CAC support bracket 114 in FIG. 6 also depicts a bushing408 installed in the coupling hole 378 of the upper lug 358. The bushing408 provides a bearing portion for a fastener (not depicted) to engagewith the coupling point 116 a of FIG. 1.

FIG. 7 is detailed view of a portion of the cross-support bracketmounting portion 354 of the CAC support bracket 114 according to anembodiment as taken at section line 7 of FIG. 4. Substantially smoothregions 410 are defined relative to the slotted holes 372, 374, and 376.For example, the substantially smooth regions 410 may be free of cuspsassociated with tooling used to manufacture the CAC support bracket 114.The substantially smooth regions 410 may be defined as extending aminimum length L18 of about 1.1 inches (2.794 cm) below the slottedholes 372 and 374, and a minimum length L19 of about 0.975 inches (2.477cm) above the slotted hole 376.

A number of ratios are defined between elements of the CAC supportbracket 114 as depicted in FIGS. 1-7. In an embodiment, a ratio of thelength L13 of longitudinal offset between the lower slotted holes 372,374 and the upper slotted hole 376 to the length L17 of lateral offsetbetween the lower slotted hole 372 and the upper slotted hole 376 isbetween 2.47 and 2.91. A ratio of the length L13 between the lowerslotted holes 372, 374 and the upper slotted hole 376 to the minimumlength L19 above the slotted hole 376 of the substantially smoothregions 410 is at most 1.405:0.975. A ratio of the length L7 definedbetween the outer edge 386 and CLB to the diameter D1 of the CACmounting holes 362, 364, and 366 is between 19.93 and 21.10. A ratio ofthe angle θ5 defined between CLB and the first angled edge 384 relativeto the angle θ6 defined between the lower edge 388 and the second anglededge 390 is between 2.04 and 2.21. A ratio of the length L3 from CLB atdatum A to the central axis 377 of the coupling hole 378 to the lengthL2 from CLB at datum A to the upper lug portion 356 is between 1.120 and1.127. A ratio of the length L5 defined from the projection 379 normalto CLB at datum A to the upper end 380 to the length L4 defined from theprojection 379 normal to CLB at datum A to the upper lug portion 356 isbetween 1.256 and 1.282.

A process of installing the CAC support bracket 114 in the cabin airconditioning and temperature control system 100 is described inreference to FIGS. 1-7. The upper lug 358 of the CAC support bracket 114is coupled to the coupling point 116 a of the lower three-way mount 118.The CAC mounting portion 350 of the CAC support bracket 114 is coupledto the CAC 110. The cross-support bracket mounting portion 354 of theCAC support bracket 114 is coupled to the cross-support bracket 112. Thecross-support bracket 112 is also coupled to the CAC support bracket108. The CAC support bracket 108 is coupled to the CAC 110 and to thecoupling point 104 a of the upper three-way mount 102. As previouslydescribed, the CAC support bracket 114 includes the CAC mounting portion350 formed substantially orthogonal to the access portion 352 and thestructural support portion 360, as well as the cross-support bracketmounting portion 354 formed at an angle (e.g., angle θ1) relative to theaccess portion 352. The upper lug portion 356 is formed at an angle(e.g., angle θ2) relative to the access portion 352 and substantiallyorthogonal to the upper lug 358. A ratio of the length L13 oflongitudinal offset defined between the lower slotted holes 372, 374 andthe upper slotted hole 376 to the length L17 of lateral offset between acenter of at least one of the lower slotted holes 372, 374 and the upperslotted hole 376 is between 2.47 and 2.91.

While the invention has been described in detail in connection with onlya limited number of embodiments, it should be readily understood thatthe invention is not limited to such disclosed embodiments. Rather, theinvention can be modified to incorporate any number of variations,alterations, substitutions or equivalent arrangements not heretoforedescribed, but which are commensurate with the spirit and scope of theinvention. Additionally, while various embodiments of the invention havebeen described, it is to be understood that aspects of the invention mayinclude only some of the described embodiments. Accordingly, theinvention is not to be seen as limited by the foregoing description, butis only limited by the scope of the appended claims.

1. A support bracket for a cabin air compressor assembly, the supportbracket comprising: a cabin air compressor mounting portion formedsubstantially orthogonal to an access portion and a structural supportportion; a cross-support bracket mounting portion formed at an anglerelative to the access portion; an upper lug portion formed at an anglerelative to the access portion and substantially orthogonal to an upperlug; a plurality of cabin air compressor mounting holes in the cabin aircompressor mounting portion, the cabin air compressor mounting holesdistributed in an arc configuration along a cabin air compressormounting hole circle radius; and a plurality of lower slotted holes andan upper slotted hole in the cross-support bracket mounting portion,wherein a ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.
 2. The support bracketof claim 1, wherein substantially smooth regions are formed above theupper slotted hole in the cross-support bracket mounting portion andbelow the lower slotted holes in the cross-support bracket mountingportion, and a ratio of the length of longitudinal offset definedbetween the lower slotted holes and the upper slotted hole to a lengthabove the upper slotted hole of the substantially smooth regions is atmost 1.405:0.975.
 3. The support bracket of claim 1, wherein the cabinair compressor mounting holes further comprise a first cabin aircompressor mounting hole, a second cabin air compressor mounting hole,and a third cabin air compressor mounting hole, and the cabin aircompressor mounting portion further comprises a curved edge proximatethe cabin air compressor mounting holes, a first angled edge proximatethe third cabin air compressor mounting hole and formed between thecurved edge and an outer edge of the cabin air compressor mountingportion, a lower edge substantially normal to the outer edge, a secondangled edge proximate to the first cabin air compressor mounting holeand formed between the lower edge and the curved edge, a centerlinedefined through the first cabin air compressor mounting hole, and adatum defined on a cabin air compressor side of the cabin air compressormounting portion.
 4. The support bracket of claim 3, wherein a ratio ofa length defined between the outer edge and the centerline to a diameterof each of the cabin air compressor mounting holes is between 19.93 and21.10.
 5. The support bracket of claim 3, wherein a ratio of an angledefined between the centerline and the first angled edge relative to anangle defined between the lower edge and the second angled edge isbetween 2.04 and 2.21.
 6. The support bracket of claim 3, wherein aratio of a length from the centerline at the datum to a central axis ofa coupling hole of the upper lug relative to a length from thecenterline at the datum to the upper lug portion is between 1.120 and1.127.
 7. The support bracket of claim 3, wherein a ratio of a lengthdefined from a projection normal to the centerline at the datum to anupper end that is substantially orthogonal to the upper lug portionrelative to the centerline at the datum to the upper lug portion isbetween 1.256 and 1.282.
 8. A cabin air compressor support assemblycomprising: a left-hand cabin air compressor support bracket coupled toa cabin air compressor assembly, a cross-support bracket, and an upperthree-way mount; and a right-hand cabin air compressor support bracketcoupled to the cabin air compressor assembly, the cross-support bracket,and a lower three-way mount, the right-hand cabin air compressor supportbracket comprising: a cabin air compressor mounting portion formedsubstantially orthogonal to an access portion and a structural supportportion; a cross-support bracket mounting portion formed at an anglerelative to the access portion; an upper lug portion formed at an anglerelative to the access portion and substantially orthogonal to an upperlug; a plurality of cabin air compressor mounting holes in the cabin aircompressor mounting portion, the cabin air compressor mounting holesdistributed in an arc configuration along a cabin air compressormounting hole circle radius; and a plurality of lower slotted holes andan upper slotted hole in the cross-support bracket mounting portion,wherein a ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.
 9. The cabin aircompressor support assembly of claim 8, wherein substantially smoothregions are formed above the upper slotted hole in the cross-supportbracket mounting portion and below the lower slotted holes in thecross-support bracket mounting portion, and a ratio of the length oflongitudinal offset defined between the lower slotted holes and theupper slotted hole to a length above the upper slotted hole of thesubstantially smooth regions is at most 1.405:0.975.
 10. The cabin aircompressor support assembly of claim 8, wherein the cabin air compressormounting holes further comprise a first cabin air compressor mountinghole, a second cabin air compressor mounting hole, and a third cabin aircompressor mounting hole, and the cabin air compressor mounting portionfurther comprises a curved edge proximate the cabin air compressormounting holes, a first angled edge proximate the third cabin aircompressor mounting hole and formed between the curved edge and an outeredge of the cabin air compressor mounting portion, a lower edgesubstantially normal to the outer edge, a second angled edge proximateto the first cabin air compressor mounting hole and formed between thelower edge and the curved edge, a centerline defined through the firstcabin air compressor mounting hole, and a datum defined on a cabin aircompressor side of the cabin air compressor mounting portion.
 11. Thecabin air compressor support assembly of claim 10, wherein a ratio of alength defined between the outer edge and the centerline to a diameterof each of the cabin air compressor mounting holes is between 19.93 and21.10.
 12. The cabin air compressor support assembly of claim 10,wherein a ratio of an angle defined between the centerline and the firstangled edge relative to an angle defined between the lower edge and thesecond angled edge is between 2.04 and 2.21.
 13. The cabin aircompressor support assembly of claim 10, wherein a ratio of a lengthfrom the centerline at the datum to a central axis of a coupling hole ofthe upper lug relative to a length from the centerline at the datum tothe upper lug portion is between 1.120 and 1.127.
 14. The cabin aircompressor support assembly of claim 10, wherein a ratio of a lengthdefined from a projection normal to the centerline at the datum to anupper end that is substantially orthogonal to the upper lug portionrelative to the centerline at the datum to the upper lug portion isbetween 1.256 and 1.282.
 15. A method of installing a support bracket ina cabin air conditioning and temperature control system comprising:coupling an upper lug of the support bracket to a mount of the cabin airconditioning and temperature control system; coupling a cabin aircompressor mounting portion of the support bracket to a cabin aircompressor assembly of the cabin air conditioning and temperaturecontrol system; and coupling a cross-support bracket mounting portion ofthe support bracket to a cross-support bracket, the support bracketcomprising: the cabin air compressor mounting portion formedsubstantially orthogonal to an access portion and a structural supportportion; the cross-support bracket mounting portion formed at an anglerelative to the access portion; an upper lug portion formed at an anglerelative to the access portion and substantially orthogonal to the upperlug; a plurality of cabin air compressor mounting holes in the cabin aircompressor mounting portion, the cabin air compressor mounting holesdistributed in an arc configuration along a cabin air compressormounting hole circle radius; and a plurality of lower slotted holes andan upper slotted hole in the cross-support bracket mounting portion,wherein a ratio of a length of longitudinal offset defined between thelower slotted holes and the upper slotted hole to a length of lateraloffset between a center of at least one of the lower slotted holes andthe upper slotted hole is between 2.47 and 2.91.
 16. The method of claim15, wherein the support bracket is a right-hand support bracket, and themethod further comprises: coupling the cross-support bracket to a secondsupport bracket that is coupled to the cabin air compressor assembly anda second mount of the cabin air conditioning and temperature controlsystem.
 17. The method of claim 15, wherein the cabin air compressormounting holes further comprise a first cabin air compressor mountinghole, a second cabin air compressor mounting hole, and a third cabin aircompressor mounting hole, and the cabin air compressor mounting portionfurther comprises a curved edge proximate the cabin air compressormounting holes, a first angled edge proximate the third cabin aircompressor mounting hole and formed between the curved edge and an outeredge of the cabin air compressor mounting portion, a lower edgesubstantially normal to the outer edge, a second angled edge proximateto the first cabin air compressor mounting hole and formed between thelower edge and the curved edge, a centerline defined through the firstcabin air compressor mounting hole, and a datum defined on a cabin aircompressor side of the cabin air compressor mounting portion.
 18. Themethod of claim 17, wherein a ratio of a length defined between theouter edge and the centerline to a diameter of each of the cabin aircompressor mounting holes is between 19.93 and 21.10.
 19. The method ofclaim 17, wherein a ratio of an angle defined between the centerline andthe first angled edge relative to an angle defined between the loweredge and the second angled edge is between 2.04 and 2.21.
 20. The methodof claim 17, wherein a ratio of a length from the centerline at thedatum to a central axis of a coupling hole of the upper lug relative toa length from the centerline at the datum to the upper lug portion isbetween 1.120 and 1.127, and a ratio of a length defined from aprojection normal to the centerline at the datum to an upper end that issubstantially orthogonal to the upper lug portion relative to thecenterline at the datum to the upper lug portion is between 1.256 and1.282.